Demons - What are they?

What exactly is a demon? Homer used the terms "demons" and gods" interchangeably. Another opinion is that demons are intermediaries between men and gods, and that demons had once been men. Plutarch speaks of human souls as commencing first as heros, then as demons, then advancing to the sublime. The Phoenicians and Egyptians accounted those the greatest gods who had found out things most necessary and useful in life. Our current use of the word "demon" denotes a spirit of a maglignant nature . There is still uncertainty as to whether demons are distinct and separate from the Devil and his fallen angels. We often hear of demon possession which today would be diagnosed as a mental illness.What do you think?

I think they are real just like ghost and angels are real. They can also trick you and change there image to look like someone you know or something else. When going on ghost hunts always be careful your not dealing with a demon who is making you think they are a ghost.